Staking machine



June 18, 1940. e. A. SCHETTLER STAKING MACHINE Filed Jan. 24, 1939 3 Sheets-Sheet 1 Z'mventor June 18, 1940. SCHETTLER 2,204,625

STAKING MACHINE Filed Jan. 24, 1938 3 Sheets-Sheet 3 Patented June 18, 1940 The Turner Tanning Machinery. Company,

Peabody, Mass, a corporation of Maine Application January 24, 1938, Serial No. 186,635 In Great Britain February 2, 1937 i 46 Claims. .This invention relates to machinesfor treating hides and skins. While the invention is illustrated as embodied in a machine for staking light difierent classes of worker to different portions of the same piece of work. Furthermore, in most cases, he has been unable to avoid tearing mar- .5 ginal portions of skins, and other portions having holes or tears therein. As. a result, it is not uncommon for the operator, of a staking machine to fill a good sized barrel with torn off portions of staked skins every week or so.

Accordingly, it is an object of this invention to provide a machine which will be easily controlled by the operator to suit staking operations to various classes of work and to different portions of the same piece of work. It is a further obwhich may be readily adjusted to predetermine the staking pressure upon various portions of the same piece of work, without; sacrificing immediate control of the pressure of the staking opera- 30 tion bythe operator as in prior art constructions.

It is an important feature of the invention that means is provided for enabling the operator to .predetermine the character and direction of an increased staking pressure or, alternatively, of a decreased staking pressure as the. staking tool operates progressively on various portions of a given piece of work. In other words,,th e operator may so condition the staking machine that the machine will automatically increase the 40 staking pressure from a central portion of a skin to an edge portion thereof. Alternatively, he may readily condition the machine so that it will automatically decrease the staking pressure from a middle portion of the skin where staking begins to anedge portion thereof. Whether the staking pressure should remain thev same throughout the stroke of the tools or progressively increase or progressively decrease from a centra1 portion to an edge portion of a given skin will depend upon the characteristics of that skin and the purposes for which it is to be used. In addition, the operator may exercise direct control of the stakingoperation to increase or, de-

crease the staking pressure in accordance with ject of. the invention to provide a construction his judgment of the requirements of a given piece of 'work. i

A further important advantage of the machine of my invention is found in the fact that the operator may control initiation of the clamping of 5 awork piece as a preliminary to staking operations thereon, after insertion of the work piece into a machine wherein operation of the staking tools is also directly controlled by the operator. To this end, a single manually controllable mem- 0 her, such as a treadle, is provided with connections for controlling the clamp operating means and also the tool operating means, in an organization wherein the clamping means is power operated in such manner as to insure clamping action before the staking tools engage the work piece.

In the illustrated construction, the staking tools reciprocate back and forth in spaced work receiving position until the treadle is depressed by the operator to initiate a staking operation. Hence .the operator may introduce a piece of work at any point in the back and forth movement of the tools and determinethe beginning and the length of the effective stroke of the staking tools. In other words, he may terminate the staking operation at any point in what would otherwise be the normal operative stroke of the tools. This enables the operator to avoid holes in the work piece and to terminatethe operation 0 of the tools at will.

In a preferred embodiment of the invention, the staking tools are carried by a pair of arms which are pivotally mounted on a carriage by which the arms may be reciprocated' back and forth during staking operations, a member being provided to connect the arms positively to each otherso that movement of the one is followed .by

movement ofthe other to an equal extent and in 1 the opposite direction, in an arrangement in which spring means is provided for holding the arms apart so that normally there is no staking operation during back and forth movementsof the arms It is an important feature of this construction that cam means is provided under control of a manually operable member for causing the arms to move toward each other whereby the staking tools engage the work piece in a staking operation, the arrangement being such that the operator initiates operation of the staking tools 5 after he has introduced a piece of work in place between the spaced reciprocating tools. While staking tools ofany well-known construction and arrangement may be employed in the organized machinedescribed in the foregoing 5 I other, blades.

paragraphs, a preferred construction comprises an upper and a lower blade arranged in overlapping relation and in parallel planes, together with a third blade on the lower staking arm inclined upwardly and forwardly in a plane to intersect the first-mentioned blades, whereby the third blade efiects a milder staking action than the v, Such construction preferably comprises also rolls on the upper and lower staking arms to press the work piece into the space between the lower blades. the rolls is yieldingly mounted and isprovided with braking means to limit the yielding and turning movement thereof, thus securing a certain predetermined staking pressure in spite of the yielding of the roll.

These and other important features of the invention and novel combinations of parts will now be described in detail and then pointed out more particularly in the appended claims.

- In the drawings,

Fig. 1 is aside elevation, partly in section and with parts broken away for clearness, of a leather staking machine constructed in accordance with the invention;

Fig.2 is a rear elevation of the machine also partly in section;

Fig. 3 is aside elevation of operating mechanism for staking tools in another embodiment of the invention;

1 Fig. 4 is a front elevation of a treadle arrange- -rnent hereinafter particularly described;

Fig. 5 is aside view of a portion of the leather working means with co-operating elements arranged differently from those shown in Fig. 1;

Fig. 6 is a view similar to Fig- 5 showing another arrangement of staking tools.

Referring to the drawings, the machine has two side frames I and 2, one of which is provided with a bearing 3 (Fig. 2) for a crank shaft 4. On the inner end of the crank shaft 4, an eccentrio 5 is mounted which is shaped to actuate a clamp operating lever 6. Attached to this eccentric 'is a flywheel l' which carries a crank pin 3.

At its outerend the crank shaft 4 is provided with a driving pulley 9. An idle pulley l (Fig. 2) is supported by the bearing casting 3. Pivotally connected to the crank pin 8 is a connecting rod ll (Fig. 1). This connecting rod carries on the end opposite to the crank pin a cam 12 ff or operating a pair of tool arms l3 and M, in a "construction wherein. the connecting rod ll oscillates on a gudgeon pin 15. The tool arms l3, M are pivotallymounted on a crosshead or carriage It consisting of two plates (Fig. 2) suitably connected. As illustrated, the gudgeon pin I is not directly attached to the crosshead or car- 'riage'lii but is carried by levers or links I Tl which at one end are connected to the crosshead or carriage it by apivot pin I8. At their other ends the levers or links I? are joined by a connecting pm Hi pivoted in the upper end of a link which is adjustably connected at its lower end by means of a pin 2| to a treadle 22. Downward movement of the treadle 22 causes the pin fit? to move upwardly, which movement is additional to the horizontal movement which is imparted by the crank shaft II. The tool arms I3 and I l are pivotally supported on the carriage or crosshead l6 by pivot pins 23 and 24. Both tool arms are shaped as'shown to form bell cranks. 'The inner ends of these bell cranks are connected by spaced parallel links 25 (Figs. 1 and 2) and by pivot pins 26 and 21 which are of an eccentric Conveniently, one of and I4. movement of the arms l3 and Hi can continue a secondary parallelogram within the first.

gudgeon pin 15 and the cam l2,

'constructionfor thepurpose of effecting relative adjustment of the saidarms l3 and M to bring the tools I3a and Ma. carried thereby to the desired working distance apart when the arms are closed.

As the two tool arms l3. and M are approximately of identical construction and weight, they counterbalance one another through the link and pivot connections 25, 26 and 21'. Only a light spring 28 is required to keep a roller 3| on the arm l4 in contact with the cam [2. As shown, the spring 28 is mounted on that portion of the arm l3 which projects downwardly from the pivot pin 23, the mounting comprising a shouldered stud having a portion projecting into the spring 28. At its other end the spring is mounted on a similarly shouldered pin 29 which is screw threaded in a tapped opening through the center of a tie rod 2% fixedly secured to the spaced sion in-the spring 28 and may then be locked in its adjusted position by a lock nut 29b. A further adjusting screw 30 is provided on the crosshead lB. This adjustingscrew limits the opening movement of the two tool arms 13 and M'which takes place after thetreadle 22 has been released. It is to be understood that it is possible to lower the pin 15 so far that the cam I2 is brought out of contact with the cam roller 3|, in which case the screw-30 becomes the support of'the arms l3 When this is the case the reciprocating while the opening and closing motion of the arms and staking tools is eliminated, i. e., the tools are rendered inoperative.

In constructing a high speed machine with as low a frictional resistance as possible, the crosshead or carriage I6 is supported on two swing arms 32 and 33. These swing arms are pivoted in the two side frames l and 2 at the points 34 and 35 in the corresponding pivot shafts. The front of the crosshead or carriage l 6 is supported on the front swing arm 32 at the point 36 in a corresponding pivot shaft, whereas the back of the carriage I6 is supported on the back swing arms 33-;at a point in the corresponding pivot pin [8. The points [8, 34, 35, 36 form a parallelogram. .Normally the points i8, 34, 2!, N) form Both parallelograms oscillate together, and if normally the parallelism of the link 20 with the arms 32, 33 is preserved the distance between the tools throughout the work-treatingstroke does not change. That is to say, the gudgeon pin l5 follows the same general horizontally arcuate path as the carrige It so long as the distance between the points l8 and I9 remains the same as that between the points 2|, 34, i. e., with the link 20 parallel to the swing arms 32 and 33. While these conditions are preserved, the tools describe a parallel-sided path, the width of which is. determined by the adjustment of the tool arms by the eccentric pins 26 and 21, for the reason that the effect of thecam IE on the roller 3| remains If, however, the secondary parallelogram is eliminated by varying. the length of one of the short sides by adjustment of the pin 2| in a horizontal direction in a slot 2Ia in the treadle 22, the

when reciprocated, are automatically caused to move relatively to" the carriage and thereby follow a 'diiTerent path, i."e.,-'either an upwardly or downwardly instroke of the tool arms and the tools describe :a tapered path, the sides of this are either apnvergent or divergent rearwardly according to the position of the adjustment pin 2| in the slot 21a in the t-reaclle flii, so that the pressure of the tools automatically varies accordingly. In other .ivotds; the cam member l2 has a movement of translation rclativeto the carriage It, as well as a rocking movemenuboth movements taking place during reciprocation of the carriage. This is very dvantageous under certain conditions and especially desirable in the treatment of glove leather in which the body of the leatherreceives only a light staking action whereas the edges wantpulling out harder; As already alluded to, themachine may be conditioned to do this automatically by. appropriate adjustment of thepin 2! ainthe slotfiia. in thetreadle 22. By adjustment on thepin iii in a direction away from the shaft (and to the right from theposition shown in Figmld; eacl'rworkingstroke ofthe tools will start with a light pressure and finish with a heavy pressure. By adjustment of the pin 2| inthe opposite direction (that is, toward the shaft 350. from. its central position, the opposite effect, i. e., starting with a heavy pressure and finishing with alight pressure, is achieved. As

indicated, theadjustment of the pinjzl in the slot .Ziais relatively smalluthe length of the slot 2 iabeing about one and oneehalf inches in-a mawchinewherein the length of the link 2!] is about twenty-eight 1 and one-half inches.

:The inventionisnot confined to the parallelogramarrangement just described. Another construction is provided when it is desired to utilize the described novelfeatures in a machine with a longer stroke and for heavy work. As illustrated in 3, it is possible to havethe crosshead or :carriage it supported in. or on stationary grooved wslidebars one of which is shown at 6B, in which lease. the levers or links I! will be provided with a cam roller ti. running on a runner path or .guidewaytf-i. The guideway 82 is connected with .the treadle 22 by connections which comprise bell crank levers (it and 54, alink 65having a turnbuckle 65d therein, another bell .cranklever 66, and a connecting rod so that the runner path 62 can be raised and lowered by the treadle for the purpose of eiiecting normal staking move ments of the arms i3 and M by lifting the pin it and cam i2, as previouslydescribed in con-- nection with the link 20 and treadle 22. The runner path 62 is arrangedin such a manner that, in addition to its position wherein it is parallel to the main guide-bars 60, it canbe inclined by being raised or lowered at one end, in

order to obtain thevariations in pressure at different portions of thestroke of the tools as previously described in connection with the con- To eilect the desired adjustment of the runner path or guideway 62, the treadle 22 is first depressed the normal amount, as determined by the stop screw 53. This lifts the runner path 62 andalso stabilizes the bell crank 63. Now by rotation of the turnbuckleitila, the link 65 is lengthened or shortened thus. adjusting the bell crank '3 to lift or to A lower the adjacent end of: the guideway. 3?. Lifting the said end of the guideway 62 will. automatlcall y cause increased staking sheet on the marginal portions of a piece of work, while lowering said1end will cause a predetermined milder staking effect on said marginal portions as compared with more central portions of the same piece of work. V

jizfI here is "provided, in conjunction with the staking mechanism previously described, clampingwmeehanismixtohold the leather during each working stroke. The clamping mechanism com- .prises aclampbar 31, whichds rigidly attached tothe tworframes l and "2 .of the-machine, and a clamp member. (carrying a cushion member .380.) which is. movably-mounted on a pivot 33.

For the purpose of .keepingthe clamp in the ;open or. work receiving position, a compression .spring 49 is provided. Furthermore, on the clamp member 3&is a projecting arm 48 which limits the openingmovement of the clamp byucontact with a stop 42 (Fig! 1). .There is a connectionbetween the clamp member 38, the cam roll lever t and the treadle 22 which is provided by a steel wire rope 56; or other suitable flexible member. .The wire rope is connected to the clamp member .38 atthe point 43; It passes over arope pulley Miand over. pulleys 44a and 45 on the lever 6 to a .levere lfi which is loosely. mounted on a shaft 47.. .Acasting 48 iskeyedto the shaft 41 and for adjustablytensioning therope' is provided with.

adjusting screws 49. The shaft 41 passes through the frame of the machine and carries on the outside ofthe frame a lever 50 (Figs. 1 and 2) .WhiChiS also keyed to its shaft. This lever 5!! is provided with ace-m roller 5| operating against a cam segment '52 which is keyed to the treadle shaft 35. On the opposite sideof the shaft 35, the cam segment 52 is provided with a screw 53 which limits the movement of the treadle under pressure of the foot and also the move-' ment of the cam 52 in relation to the cam roller 51L The cam lever ii isprovided with a roller which is acted upon by the cam 5. This cam 5 is timed in such a mannerthat the clamp 33 isolosed. before the. tools on arms Band M are completely closed by the cam l2 at the beginning ,of the operative stroke of the tools. The cam lever 6 is "further provided with a compres sionspring 54 for the purpose of keeping the cam roller 55 on the lever 6 away from the earn 5, when the treadle 22' isin the inoperative position. Whemthe treadle is up no movement is imparted :to the .clamp member '38 which remains up in open or work receiving position under the action .of. the; spring 40. Conveniently the spring 54 is mounted. similarly to spring 2B,oneend of the spring 54 being mounted on a shouldered stud secured to the lower end of the lever 6 while the other end of the spring 54 is mounted on a shouldered. set screw 54:; adjustable through being screw threaded. into a tapped opening in a studtfidb :rigidly secured to the machine frame. 'Itwwill be clear that the set screw Ma may be adjusted to secure the desired tension in the ,springfifi and that it may be then secured in its adjusted position by a lock nut 540. ...In operation the clamp functions as follows: i that the treadle 22 and the clamp membervBB are in the normal or inoperative position shown by full lines in Fig. 1. Then, when the treadle 22 is depressed, the cam 52 will move the lever ,50 and apply tension to the rope 56. If at this time the cam 5 is in a position to resist movement-of the lever 5, that is, with the high part of the cam to the right in Fig. 1, this movement of the treadle downwardly will move the clamp member 38 against the action of the spring ill to the closed position indicated by dotted lines in Fig. 1. r If, at the time of depressing the treadle ment of the leverfi the movement of the treadle 22 will not operate the clamp member 38 to clamping position. Since the spring 54 is weaker than the spring 40, such depression of the treadle will pull said lever 6 into contact with the lowest part of the cam 5so that the latter as it revolves will close, the clanip'in properly timed relation vto the operative stroke of the staking tools.

Thereafter the clamp is opened and closed at every revolution of. the crank shaft 4 -by the spring it and the camv 5 operating in conjunction in timed relation with the reciprocation of the tool arms l3 and I4 which are also opened and closed at every revolution of the crank by -when the treadle is released the said clamping and staking means are rendered inoperative. Release of'the treadle results in movement of the cam l2 downwardly to a position in which it fails to act on the roller 3|, thus accounting for the inoperative strokes of the staking tools. Also, release of the treadle permits the spring 54 to move the levert to inoperative position away from the cam 5.

The machine may be provided with an additional treadle so arranged in conjunction with the treadle 22 that the treadle shaft 35 acts as a torsion spring when the treadle 22a is depressed to its downward limit, thereby enabling pressure to be applied yieldingly to the work. Referring to Fig. 4 of the drawings, it will be noticed that the treadle 22 is secured approximately at the center of the shaft 35 in an arrangement wherein the treadle 22 carries the extension for the pivot pin 2|. The second treadle 22a is an extension forwardly of the cam segment 52 which is secured to the end of the shaft 35'outside of the frame I, this treadle being thus provided with a stop screw 53 carried by the cam segment 52 as already described. When the treadle 22a is depressed to its full limit, as determined by the stop screw 53, the pressure of the staking tools can not thereafter be varied and is constant except for the torsional yielding of the shaft 35. On the other hand, when the treadle 22 is depressed the tools can be closed to the extent which the stop screw 53 permits. In addition, however, a'heavier load on the treadle 22 will cause a further pressure on the staking tools which is permitted by a torsional deflection of the treadle shaft 35. This torsional characteristic of the shaft 35 will also become evident when the treadle 22a is utilized to control the machine, since the cam l2 and the connecting rod 2|] may yield downwardly according to the thickness of the leather passing through the tools through torsion in the shaft 35, and therefore a yielding pressure is applied to the work piece which is controlled by the strength or thickness of the treadle shaft. 7

For the purpose of facilitating the handling of the leather, a table made in two sections 58, 59, .is provided on the operating end of the machine.

The section 58 is parallel with the tool path while the section 59 is inclined relatively to the section 58. This inclination is to facilitate the entry of theleather under the clamp. The path of the toolsmay be generally horizontal; as in the machine shown in the drawings,

of the roller spindle is or the-parts may be so arranged as to have the ,tools co-operate with an inclined table in place knives 13 and 14 mounted at corresponding angles on the holders H and 12, respectively, so as to act with'a sharper effect on the leather. Preferably there is also a back knife 15 inclined in the opposite direction to the front knives and at a greater angle on the holder 12 so that the leather can pass between the rollers 69 and 10 in an easier manner to permit the machine to work at a higher speed. The rollers may be made of rubber. Alternatively, there may be provided a roller tool characterized by the feature that the roller is yieldably mounted in its holder, convenientlyby means of springs one of which is shown at 76 (Fig. 6) each associated with a block at the adjacent end of the roller within a holder such as H, although rubber buffers may be provided if desired. Either or both of the rollers, e. g., the upper roller shown in Fig. 6, may be arranged in this way. In another embodiment, a roller tool is yieldably mounted in its holder, e. g., by means of rubber buffers or springs, and characterized by the feature that a braking arrangement is provided in association with the roller whereby when the roller is subjected to pressure and consequently yields, a braking eifect is exerted thereon. According to one construction and arrangement (Fig. 6) there are provided in association with collars on the ends of one or of both rollers or the ends of a spindle which project from the roller, brake blocks 18 of wood or other suitable frictional material, the

arrangement being such that when the roller yields under pressure, a collar 80 on each end pressed against the brake block 18 and a braking eifect is thereby achieved. 1

The greater the pressure applied to the roller in use the greater the braking effect obtained, for which reason the torsion applied to the leather can be regulated according to the pressure applied to the roller.

The improvements hereinbefore set forth provide ,a machine of the type herein described wherein the jaws or tool arms of the leather working means are caused to move to and fro in unison during the reciprocating motion and such movement is completely under the control of the operator. Furthermore, the pressure applied during working strokes of the tools can be made to vary automatically without any particular attention or the exercise of especial skill on the vantageous in the staking of glove leather. An especially advantageous arrangement is found in the work gripping or clamping mechanism which, while adapted to be opened and closedpart of the operator, this being especially ad- I of it being caught prematurely by the leather .7

working meanspand especially, without havingzto time the insertion, because, ,after the; leather has beenplaced on thetable: and a atreadle, or other operating member is moved operatively to apredetermined extent, .the workgripping or clamping mechanism is the firstto come into operation to holdthe leather; the engagement of the; leatheriworkingmeansfollowing imme-' diately after: Releaseof thettrcadle or other operating member" immediately interrupts the opening and closing movementstof theleather working means and the gripping orkclamping ,m echanism. By reasonof these improvements the skill required to operate a machine ofthis type is reduced to a minimum:

t In operation the machine functions as follows:

soon as, the crank shaft his put into roptationxthe tool arms receive ,areciprocating motionythe clamp rcmainsmopen at rest. The

leather is then placedwinxthemachine and the ,treadle 22 is depressed: The *initialnmovement oflthetreadle conditions the clamp for'operationl Continued movement. of l the treadle. brings the cam I2 into operation tso thatsthe toolarms move to; and fro in relation to each othervduring it reclprocatiom and are closed on the back strokes. During the forward strokes the tool arms are opened and; thetools 13a, Ma :free the, leather.

The clamp also releasesthegleather for a short wtimer During that shortinterval thetoperator movesthe leathenso as to presenta fresh portion to thetools. ificisydesirable toincrease the pressure on any portion of the skin the oper atorsimply steps slightly harder on the treadle -22. Should therelbe a hole in the leather which,

would lead to. a tear by the tools, the operator would let upon thetreadle to such an extent that the tool armsare instantly opened to allow the tools to pass over the hole, it being preferable notto release the treadlecompletely"since, in

that case, the work clamping means would also become inoperative,

"such asjleather; a tool for operating on the work,

Having thusdescribed my'linvention, what I claim as newand desire to secure by Letters Patent of the United States; is: l

1. m amachine for treating pieoes of work,

piece; a carriage for the tool, mechanism for: reciprocating the carriage to move the tool along a surface of the workpiecegmeans to press the tool against the work piecensaid means having *aimovement of translation relative to: the care ria ge and also a rocking movement both during. reciprocation of the carriage, and means acting directly on thefirst-mentioned meansto control "its movement of translation thereby to effect automatically a predetermined"progressivevariation in ithepressure of the tool on the work piece in it piece, a carriage for the tool, means for-recip-rocating the carriage to move the toollalong-a the operative stroke/of the tool.

In a machinefor treating pieces of work, such as leather, a tool for'operating onrthetwork surfacc ofcthe work ipiece a ca'mnmember ,to

press i, the tool against thel work pieceto effect treatment of the latter, said eammember being bodily movable with respecttc the carriageduring reciprocation ofthe latter, said i cam member it having also a rocking movement duringreciproo ti'onof the carriage'to cause proper operation of: the tool, and means to control the-described bodily movement of the cam member thereby to,

effect automatically a progressively increasing pressure of the tool on the WOIk. piece, in its operative stroke. 1 1 a m an edge portion ofthe work piece.

.13. Inyamachine for treating pieces ,of ,work, such as leather, a tool for operatingv on the work piece, a carriagefor the tool, means for reciprocating the carriage to movethe tool along a surface of the work piece, a cam member to ,,5 press the tool against the work piece to effect treatment of the latter, said cam member being bodilymovable withrespect to the carriage during reciprocation of thelatter, said cam member having alsoa rockingmovement during, recipro-zdO cation' of the carriage to cause:proper operation ,of the tool, and means to control the described bodily movement of the cam member therebyto effect automatically a progressively decreasing pressure of the tool on the Work piece during-=15 operative stroke of the tool.

4. In a machine for treating pieces of work, such as leather, a tool for operating on the work piece, a carriage, upon which thetool is,mov ably mounted, means forreciprocating the car-s2 riage to move the tool along a surface cf the work piece, a cam member bodily movable relatively to the carriage to provide support for the tool and also movable with the carriage to press the tool against the work piece to effect treat-s ment of the latter, and means associated with t {the cam memberto move the latter relatively-to the carriageduring reciprocation ofthe latter to effect a predetermined progressive variation in thepressure of the tool onthe work piece, din-n ,ing relative movement of the tool: andwork piece.

5. In a machine for treating pieces of work, such as leathena tool for operating on a work piece, a carriage upon which the tool pivotally mounted, means for reciprocating the ,carriage gs to move the tool along assurface of the work piece, a cam member bodily movable relatively "to the carriage :to provide support for the tool and also movable with the carriage totpress the tool against the work piece to effect treatment go of the la tter, and means operating directlyon the cam member to change its positionrelative to the carriage during the, operative stroke'of the toolthereby to cause a predetermined progressively increasing pressure of the? tool on the worm- 35 piece in its operative stroke, whereby thewoperating pressure of the tool gradually increases asthetool approachestan edge portion ofthe 6. In a machine forl treating pieces of, workmo such as leather, a tool for operating on thetwork piece, a carriage, an arm carrying the tooland .pivotally mounted on the carriage, means, for reciprocating the carriage to move the tool along asurface of the work piece, a cam member bodily,;; movable, relatively to the carriage to provide support, for the tool and also movablewith the carriagetto operate on said arm to press the tool against the work piece to effect treatment of the latter, and means operatingdirectly on the cam so to change its position relative to the carriage and to control said tool carrying arm to cause a predetermined progressively decreasingpressure of the tool on the work piece during the travel or the tool along a surface of the work .piece,,:fi5 wherebyqthe operating pressure of the toolon the work piece decreases as thetool, approache eces; of WOl'k,

7. In a machine for treating, p1

such as leather, a carriage, an upper and a lowertr'io arm pivotally mounted on said carriage, co-

operating; staking tools mounted on said arms,

I meansfor reciprocating the carriage and the arms to move thetools relatively to the work piece, meansmovablewith the arms; 120,;furnish ,5

tools are held in work treating position, means to cause operation of the tools with respect to the work piece to effect treatment of the latter, and means operating directly onthe arms supporting means to support the latter for move 'ment along an inclined path thereby to effect I automatically a predetermined progressive variation in the pressure of the tools on the work piece in the operative stroke of the tools.

,8. In a machine for treating pieces of work, such as leather, an upper and, a lower arm, co operating staking tools mounted on said arms, means comprising. a'rocking connecting rod to reciprocate the arms to effect movement of the tools relatively to the work piece, a cam member mounted on that end of the connecting rod adjacent to said arms and operative during rocking movement thereof to cause relative movement of the tools to engage the workpiece to effect treatment of the latter, and means to lift the cam member progressively with its travel in one direction to efiect automatically a progressively increasing pressure of the tools on the work piece during their operative stroke.

9. In a machine for treating pieces of work, such as leather, an upper and a lower arm, cooperating staking tools mounted on said arms, means comprising a connecting rod to reciprocate the arms to effect movement of the tools relatively to the work piece; a cam member mounted on that end of the connecting rod adjacent to said arms and operative to cause relative movement of the tools tofengage the work 35 piece to eiTect treatment of the latter, and means to lower the cam member progressively with its travel in one direction'to ehfect automatically a progressively decreasing pressure of the tools on the work piece during their operative stroke.

10. In a machine for treating pieces of work, such as leather, an upper and'a lower arm, cooperating staking tools mounted on said arms, means for reciprocating the arms to move the tools relatively to the work piece, a cam member movable with the arms to cause the tools to engage the work piece to effect treatment of the latter, a support for the cam member, and means operative during the working stroke of the staking tools for adjusting the support with respect to the cam member to effect automatically a predetermined progressive variation in the pressure of the tools on the work piece dur ing staking operations on a given piece of work.

11. In a machine for treating pieces 'of'work, such as leather, an upper and a lower arm, eooperating staking tools mounted on said arms, means to reciprocate the arms to effect movement of the tools relatively ,to the work piece, a

' lever pivotally connected with said arms, a cam member pivotally connected to said lever to move with said arms and operative to press the tools against the work piece to eflect treatment of the latter, a-guideway, a roller-on said lever arranged to run on said guideway to support and guide the cam member during reciprocation thereof, and means for adjusting the guideway with respect to the, cam member to effect auto-- matieally a progressively increasing pressure of the tools on the workpiece during their operative stroke.

12. Ina machine for treating pieces of work, such as leather, a carriage, co-operating staking tools mounted on said carriage, meansto reciprocate the, carriage to efiectmovement of the tools relatively to the workpiece, a lever pivadditional support for the latter by which the 'otally mounted on said carriage, a cam membe:

pivotally connected to said lever to move witl said carriage and operative to cause the tools 134 engage the Work piece to effect treatment of thl piece, a carriage for the tool, means for reciproeating the carriageto move the tool along a surface of the work piece, a cam member associated with the carriage and :with said reciprocating means to cause pressure. of the tool with respect' to the work piece'to efiect treatment of the latter, a support for the cam member, means for operating the support, and adjustable connections between the last-mentioned means and the support to adjust the latter to effect a progressively upward] movement of the cam member during theeffective stroke of thetool, whereby the tool operates with progressive variation inpressure from amiddle portion to an edge portion of the piece of work.

14. In a machine for treating pieces ofwork;

such as leather, a tool for operating on the Work piece, a carriage for the tool, means for reciproeating the carriage to move the tool along a surface of the work piece while the latter is held against movement, 'a camwmember associated.

with the carriage and with the reciprocating means forthe" carriage tov cause pressure of the tool with respect to the-work piece during relative movement between the tool and Work piece, a support for the cam member, and means to adjust-the'in'clination of said support to effect either a lifting or a lowering of the cam member during the operative stroke of the latter, whereby the pressure of the tool upon the work piece will be progressively changed during travel of the tool and work piece relative toeach other.

15. In a staking machine, an upper and a lower arm, co-operating staking tools carried by said arms to engage opposite'sur'faces of a piece 'of WOI'k,3, carriage carrying said arms, a link pivotallyconnected to the carriage, means for reciprocating the carriage and arms comprising a connecting rod pivotally connected to the link,

a cam member mounted on the pivoted end of of work, a carriage carrying said arms, a link pivotally connected to the carriage, means for reciprocating the carriage'and arms comprising a connecting rod pivotally connected to the link, a cam member mounted on the pivoted end of the connecting rod, a support for the link which serves also as asupport for said cam, means for adjusting the-support to eifect automatically a progressive variation in the pressure effected by said cam member on the staking tools, and a manually operable'member connected to said support to increase the pressure of the staking operation at the will of the operator.

17. In a machine for' treatingpieces ofwork, lllCh as leather, a tool for operating onthe work iiece, a carriage for the tool, means for reciprocating the carriage to move the tool along a ;urface of thework piece whilethe latter is held igainst movement, a cam member pivotally connected to the carriage and with thereciprocating neansforthe carriage to causcpressure of the 3001 with respect to the work piece during relazive movement between the tool and work piece, rsupport for the cam member and carriage com prising a pair of parallel link members pivotally connected attheir upper ends to the carriage, a third link member pivotally connected at its upper end to said camniem'cer, a treadle pivotally connected to the lower end ofsaid third link member, the connection between the third link member and the treadle comprisingapin andaslot and the arrangement being such that with the pin at the middle of the slot the third link is parallel to the pair of link members and the cam member is caused to effect substantially uniform pressure of the tool on the work piece during operative stroke of the latter while adjustment of the pin in the slot to either end of the latter causes a progressive variation in the pressure of the tool onflthe work piece during its operativestroke.

18. In a staking machine, an upper and a lower arm, co-operating staking tools mo unted on said arms, a carriage pivotally carrying said arms, a member pivoted to said arms to serve as a posi tive connection between the arms, spring means between the carriage and one of said arms tending constantly to swing both arms away from each other about their pivot points, means comprising aconnecting rod to reciprocate the carriage and the arms carried thereby, and a cam member mounted on said connecting rod and operative when in its normal raised position to effect alternate opening and closing of the staking tools whereby the tools engage a work piece to effect a staking operation during movementof the carriage in one direction and then release the work piece during movement of the carriage in the opposite direction.

19. In a staking machine, an upper and a lower arm, co-operating staking tools mounted on said arms, a carriage pivotally carrying said arms, means comprising a connecting rod to reciprocate saidcarriage and arms, said connecting rod being, pivotally connectedto the carriage and having a cam mounted on the pivoted end of the connecting rod, and said cam being arranged to serve when in its raised position as a support for l the pivoted arms, and a manually controllable member having connections to lift and to lower said cam whereby the cam may be rendered operativeor inoperative at the will of the oper ator, said cam member being shaped to elfect operation ofthe staking tools on the work piece during the movement ofthe carriage in one direction and release of the work piece during movement of the carriage in the other direction.

20. In astaking machine, an upper and a lower parmyco-operating staking tools mounted on said armsga carriage pivotally carrying said arms, a "member pivoted to said arms to serve as a positive, connection between the arms, spring means between the carriage and one "of said arms tending constantly to swing the arms away from each other abouttheir pivot points, means comprising a connecting rod to reciprocatethe carriage and Il the arms carried thereby, a cam member mounted QnsaidtIcQnne'cting rool and adapted when in raised position to support -and operate the tool carrying arms, and a manually operable member having connections to said cam member to lift the latter to operative position whereby the staking tools are caused alternately to engage and to release the workpiece during reciprocation of the carriage and the cam, said manually operable member being movable to a position tolower said cam to a point where it ceases to support the tool carrying arms so that the tools remain in open work receiving position during both the back and forth movements of the carriage;

21. In a machine for treating pieces of work, such as leather, a tool for operating on a work piece, a carriage for the tool, means for reciprocating the carriage and tool relatively to the pieceof work, a cam member movable with the reciprocating meansto press the tool against the piece of work while the machine is in operation, means movable relatively to the carriage during reciprocation thereof for automatically operating the cam member to cause a predetermined progressive variationin the pressure of the toolon the work piece during the operative stroke of thetool, and a manually operable member having connections to provide support for said cam member and to enable the operator to vary at will the pressure of the cam on the tool.

22. In a staking machine, an upper and a lower arm, co-operating staking tools carried by said arms to engage opposite surfaces of a piece of work, means for reciprocating said arms relatively to the piece of work, a cam member movable in an upward direction to support said arms with the tools in work treating position, said cam member being also rotatably movable during travel with the reciprocating means to cause alternate opening and closingof the staking tools relativelyto the piece of work while the machine is in operation, means operating directly on the cam member for automatically increasing the pressure of the staking tools on the work piece during their operative stroke, and a manually operable member having connections to the cam memberjto enable the operator to vary the pressure of the staking operation during the operative stroke of the tools.

23. In a staking machine, a carriage, an upper and a lower arm each pivotally mounted adjacent to one end thereof on said carriage, cooperating staking tools carried by said arms at their other ends to engage opposite surfaces of a piece of work, meansfor reciprocating said carriage and arms relatively to the piece of work, a cam member movable to engage onlythe lower of the two arms and rotatably movable during travel with the reciprocating means to cause movement of both arms to effect alternate opening and closing of the staking tools relatively to th'epiece of work while the machine is in operation, means to predetermine the amount of movement of the cam member in engaging said lowerarm thereby to effect automatically a progressively decreasing pressure of the tools on the work piece during the operative stroke of the tools, and a manually operable member having connections directly to said cam member to enable the operator to control the pressure of the staking tools during the operation of said automatically operating means.

2a. In a staking machine, an upper and a lower arm, co-Operating staking tools mounted on said arms, means for reciprocating the arms relatively toa piece of leather; means movable with the reciprocating means to effect alternateopening and closing of the-staking tools witlrrespect to the piece of leather while the machine is in operation, work clamping means, and means comprising a manually operable member having connections to control the operation of the work clamping means and of said tools in timed relation to each other.

25. In a staking machine, an upper and a lower arm, co-operating staking tools mounted on said arms, means for reciprocating the arms relatively to a piece of'leather, a cam member movable with the reciprocating means to effect alternate opening and closing of the staking tools with respect to the piece of leather while the machine is in operation, work clamping means, power means to operate the work clamping means in timed relation to the opening and closing of the staking tools while the piece of leather is being treated, and a manually operable member having con nections to said cam and said power means to initiate operation of the cam -member and of the work clamping meansmin properly timed relation to each other.

26. In a staking machine, a carriage, co-

' operating staking tools mounted on said carriage,

means for reciprocating the carriage and tools relatively to a piece of leather, a cam member pivotallymounted on the carriage to effect alternate opening and closing of the staking tools with respect to the piece of leather while the machine is in operation, a guideway to cause effective operation of said cam member when the guideway is lifted, work clamping means, and a manually operable member having connections to lift the guideway and to initiate the operation of the work clamping means in timed relation to each other.

2'7. In a staking machine, a carriage, cooperating staking tools mounted on said carriage, means for reciprocating the carriage and tools relatively to a piece of leather, a cam member pivotally mounted on the carriage to efiect alternate opening and closing of the staking tools with respect to the piece of leather while the machine is in operation, a support for the cam member to cause eiTective operation of the cam member when the support is lifted, work clamping means, power means to operate the work clamping means in timedrelation to the opening and closing of the staking tools while the piece of leather is being treated, and a manually operable member to lift the support and cam member to position for effective operation and to initiate operation of the work clamping means,

, whereby the-staking and work clamping operations take place in properly timed relation to each other.

28. In a staking machine, an upper and a lower arm, co-operating staking tools mounted on said arms, a carriage supporting said arms, means comprising a connecting rod pivoted to the carriage for reciprocating said carriage and arms, a cam member on the pivoted end of the connecting rod to cause a staking pressure of the tools with respect to the work piece during the operative stroke of the tools, a movable work clamping member to hold the work during treatment thereof, a treadle member for controlling the operation of the staking members, and a connec tion between said treadle member and the movable work clamping member arranged to initiate operation of the clamping member to hold the work against displacement prior to the operation of the staking tools thereof.

29. In a staking machine, an upper and a lower arm, co-operating stakingtools mounted on said arms, a carriage supporting said arms, meal Comprisinga connecting rod pivotally connect to the carriage for reciprocating said carria; and arms, a cam member on the pivoted end i the rod to cause a staking pressure of the toc with respect to the work piece, a support for tl cam member, a treadle member, connections bi tween the treadle member and said support effect lifting and lowering of the support there]: rendering said cam member operative or ii operative at the will of the operator, a movab work clamping member, connections between tl movable work clamping member and the tread member, and means to operate the movable W01 clamp-ing member through said connections 1 control the work clamping operation prior to tt control exercised by the treadle member wit respect to said staking tools.

30. In a staking machine, an upper and a low arm, co-operating staking tools mounted on sai arms, a carriage pivotally supporting said arm means for reciprocating the carriage and arm and for effecting alternate closing and openin of the arms whereby the tools alternately engag and release the work piece, a manually operabl member having connections to support said arm in their operative position, said member bein movable to aposition to withdraw support fror the arms whereby they remain in open positio: during reciprocation of the carriage in bot] directions, so that a piece of work may be intro duced at any point in the travel of the carriage work clamping means, and connections betweei said manually operable member and the clamp ing means to initiate closing of the clamping means upon the work piece prior to ,engagemen of the work piece by the staking tools.

31. In a staking machine, an upper and a lowe: arm, co-operating staking tools mounted on saic arms, a carriage pivotally supporting said arms means for reciprocating the carriage and arm: and for effecting alternate. closing and opening of the arms whereby the tools alternately engagi and release the Work piece, a manually operable member having connections to support said arm: in operative position, said member being movable to a position to withdraw support from the arms whereby they remain in open position during reciprocation of the carriage in both directions ths arrangement being such that the manually operable member controls the operation of the staking tools, work clamping means, power means adapted to operate the clamping means in timed relation to the closing and opening of the staking tools with respect to the work piece, and connections between said manually operable member and the power means to initiate operation of the latter.

'32. In a staking machine, an upper and a lower arm, co-operating staking tools mounted on said arms, a carriage pivotally supporting said arms, means comprising a connecting rod anda cam thereon for reciprocating the carriage and arms and for effecting alternate closing and opening of the arms whereby the tools alternately engage and release the work piece, a manually operable member having connections to support said arms in operative position, said member being movable to a position to withdraw support fromthe iecting rod, a lever carryinga roll arranged to :ontact ,saideccentri idler rolls mounted on said ever, aflexible cable passing over said idler rolls 231d connected to the work clamping means, a second lever to which the other end of the flexible zable isuconnected, andconnections between said second lever and the manually operablemember whereby movement of the latter initiates operation of the work clamping means in timed relation tothe operation of the staking tools.

3351111 astaking machine, an upper and a lower arm, a carriage supporting said arms, meansfor reciprocating the carriage and arms and for" causing thearms toswing' alternately toward and from each other during reciprocation of the car riage, a staking blade at the forward end of the upperarm, a staking blade atthe forward end of thelow er arm and lying in aplane inclined upwardly and away from the front ofthe machi11e,and a third staking blade carried by the lower arm and lying in a plane inclined upwardly and forwardly to intersect the plane of the second mentioned blade, the arrangement being such that the third blade produces a milder staking action than the second-mentioned blade.

34. In a staking machine, an upper and a lower arm, a carriage supporting said arms, means for reciprocating the carriage anda rms and, for causingthe arms to swing alternately toward and from each other duringreciprocation of the car: riage, a staking blade at the forward endof the upper arm, a staking blade at the forward end of the lower arm, a third staking blade carried by the lower arm in spaced relation to the secondmentioned blade, a roll interposed between the two lower blades, a roll mounted in the upper arm to press the work against the lower roll, spring means backing one of said rolls, and means to brake the spring-supported roll after it has yielded certain distance whereby said rollyields and then becomes resistant to pressure effected by the cd-oprating roll. i A 35. In a staking machine, an upper and a lower arm, a carriage supporting said arms, means for reciprocating the carriage, and arms and; for

causing ,the arms to swing alternately toward and from each, other during reciprocation of the carriage, a staking blade atthe forward end of the upper arm, a staking blade at the forward end of the lower arm arranged in a plane parallel to the plane of th upper staking blade, and a third staking blade carried by the lower arm and lying in a plane inclined upwardly and forwardly to intersect the first-mentioned planes, the arrangement being such that the third blade produces a ,milderstaking action than the second-mentioned blade.

i 36. In a staking machine, an upper and a lower arm, a carriage supporting said arms, means for reciprocating the carriage and arms and for causing the arms to swing alternately toward and i from each other during reciprocation of the carriage, a staking blade at the'forward end of the upper arm, astaking blade at the forward end of the lower arm arranged in a plane parallel to the plane of the upper staking blade, a third staking blade carried by the lower arm and lying ina plane inclined upwardly and forwardly to intersect the first-mentioned planes, a roll interposed between the two lower blades, a roll mounted in the upper arm to press the work against the lower roll, spring means backing said roll whereby the latter may yield, and means to brake the upper roll after it is moved downwardly a certain distance whereby said roll yields and then becomes resistant topressure effected by the upper roll. a

37. In a staking machine, an upper and alower;

arm, co-operatingstakingrtools carried by'said arms to engage opposi-te surfaces of a piece of work, said tools tending constantlyto remain in spaced relation-to eachother, means forrecipro- I cating said arms relatively to the piece of work,

a cam member movable with the reciprocating means to cause alternate opening and closing of the staking tools relatively wine piece ofwork while the machine is in operation, said cam,

member being also movable between operative position, where it causes periodic closing of the staking tools, and' inoperative position where the staking tools will remain open or spaced, and a manually operable memberhaving' connections to said cam member to enable the operator to effect gradual movement ofthe cam member to operative position and alsonrovement to inoperative position wherein the staking tools remain spaced from eachother during reciprocation thereof.

38. In a staking machine, an upper and a lower arm, co-operating staking tools carried by said arms to engage opposite surfaces of a piece of work, means for reciprocating said arms rela tively to the pieceof work, means tending con? strictly to separatesaid tools to keep them in work receiving condition, a cam member movable with the reciprocating means tocause alternate opening and closing of the staking tools relatively to the piece offwork while the machine is operation, and a manuallyoperable member havingconnections to the cam member to enable the operator to control movements of the cam member between operative and inoperative position whereby thestaking tools may operate on t ework piece or remain in spaced relationdur- 1 ing reciprocation of the arms and tools.

39,.In a staking inachine, an upper and a low er arnti, co-operating staking tools carried by said arms to engage opposite surfaces of a piece of work, means for reciprocating said arms relatively to the piece of work, meanstending constantly to separate said tools to keep them in work re ceiving condition, a cam member movable with the reciprocating means,to furnish support for the lower tool carrying arm and to cause alter nate opening and closing of the staking tools relatively to the piece of work while the machine is in operation, and amanually operable mem her having connections to said cam member to enable the operator to move the cam member to operative position and support it there, or to withdraw such. support permitting the cammenn her to move to inoperative position whereby the staking tools remain in spaced position relative to each other during reciprocation thereof.

so. In a machine for treating pieces of work,

such as leather, staking tools for operating on a -work piece, a carriage for the tools, means for reciprocating the carriage to move the tool along a surface of the work piece while the latter is held against movement, a cam member associated with the carriage and with the reciprocating means for thecarriage to cause alternate closing and opening of the tools with respect to the work piece to effect treatment of the latter, and manually controllable means for gradually rendering the cam operative whereby the staking tools periodically engage the work piece, and alternatively inoperative whereby the tools reciprocate with the carriage without closing on the work piece.

ll. In a machine for treating piecesof work,

' such as'leather, staking tools for operating on a a surface'of thework piece, a. cam member as-' sociated with the carriage and with the'reciproeating meansfor the carriage to cause pressure of the tools with respect'tothe work piece to effect treatment of the latter, a support for the cammember, a treadle connected to said support to apply pressure to the cam member and thereifore; to the staking tools, a shaft to which said treadle is secured, and a second treadle secured to the shaft whereby, upon suitable operation of the second treadle, the shaft serves as a torsional-spring to apply pressure yieldingly to the staking tools and work piece.

42. In a staking machine, staking tools to engage opposite surfaces of the piece of leather, arms carrying the tools, a carriage furnishing support for and reciprocating said arms and tools, a cam to cause the tools to engage the leather at the beginning'of the operative stroke of the tools and to control separating movement of the tools, whereby the latter have an inoperative stroke during which the leather may be moved by the operator relatively to the tools, and a treadle having connections to move said cam bodily to control its operation on the tools, the treadle being operative to vary the pressure of the cam on the tools or to withdraw the cam from its operative position thereby to cause cessation of the work of the tools on the leather, at any point in the operative stroke of the tools.

43. In a machine for operating upon leather, a tool, means for reciprocating the tool over a surface of the. leather, means for clamping the leather against movement preliminarily to the operative stroke of the tool, power means for operating the clamping means in timed relation to they beginning and ending of the operative stroke of the tool, and manually controllable means having a direct connection with said clamping means to terminate the action of the clamping means instantly at the will of the operator.

44. In a machine for operating upon leather, staking tools, means for reciprocating the tools to operate on a piece of leather, means for clampingtheleLather against movement preliminaril to theoperative stroke of the tools, power mean for operating the clamping means in timed rela tion to the beginning and ending of the opera tive stroke of the tools, and a manually operabl member having a direct connection with th clamping means for initiating a clamping actio1 on the leather preliminarily to the operation. 0 the tools on the leather. r

45. Inamachine for operating upon leather, 2 tools, means for operating the tool and for reciprocating it over a surface of the leather meansior clamping the leather against movement preliminarilytothe'operative stroke of the tool, power means for operating the clamping means in timed'relation to the beginning and ending of the operative stroke of the tool, a man ually operable member, and connections between the manually operable member and both the clamping means and the tool operating means so arranged that boththe work clamping means and the tool operating means are under the control of the operator to'have their operation on the work terminated although the power means for both the clamping means and the tool continue in operation. l

46. In a staking'machine, a pair of tools for engaging opposite sides of a piece of leather in a staking operation thereon, means for reciprocating the tools, a cam member to effect closing of theltools on the work piece in their operative stroke, said cam member being also movable to control separation of the tools for an inoperative stroke, work clamping means, power means operating both the staking tools and the work clamping means in timed relation to each other to clamp the leather before the staking tools engage it in their operative stroke, a treadle, connections from the treadle to said power means whereby-the operator mayinitiate operation of boththe work clamping means and the staking tools, and connections from the treadle to said cam member to move the latter so that the operator may render the cam inoperative to effect closing of the staking tool on the work piece at any point in the operative stroke of the latter through proper control of the said treadle.

- GUSTAV A, SCHET'ILER. 

